#include<iostream>
#include<unordered_map>
using std::endl;
using std::cout;
using std::unordered_multimap;
using std::string;

int test0(){
    unordered_multimap<int,string> _number={{5,"beijing"}};
    _number.insert({5,"beijing"});
    for(auto &ele:_number){
        cout<<ele.first<<" "<<ele.second<<endl;
    }
}

int main(void){
    test0();
}